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Date: Fri, 16 Jan 2015 03:31:45 -0800
From: Christoph Hellwig <hch@infradead.org>
To: Dongsu Park <dongsu.park@profitbricks.com>
Cc: linux-kernel@vger.kernel.org, Christoph Hellwig <hch@infradead.org>,
        Kent Overstreet <kmo@daterainc.com>, Jens Axboe <axboe@kernel.dk>,
        Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: [PATCH v2 2/7] block: rewrite __bio_copy_iov()
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On Thu, Jan 15, 2015 at 10:18:17AM -0800, Christoph Hellwig wrote:
> This breaks booting a simple KVM VM for me:

Seems like the issue actually is in the patch before this one, but
only shows up with this one applied.

The root cause is that we only copy the iov_iter, but not the
actual iovecs into the bio_map_data.

I have a fixed series, which I'll send out together with various
related cleanups ASAP.